By Joanne K. Price
With many labored examples, this booklet presents step by step guide for all calculations required for wastewater remedy. Pertinent calculations are very easily summarized in each one bankruptcy. The textual content covers the entire primary math recommendations and talents wanted for day-by-day wastewater therapy plant operations. The workbook for this e-book can be bought individually or jointly within the utilized Math for Wastewater Plant Operators Set (ISBN: 9781566769891).
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Additional info for Applied Math for Wastewater Plant Operators
Sometimes waste activated sludge SS is not known but return activated sludge SS is known. Remember that RAS SS and WAS SS are the same measurement. It is a measurement taken of secondary clarifier sludge. This sludge is either pumped back to the aerator (RAS) or wasted (WAS). 34) = Ibs/day f WAS SS Rate, MGD Dry Suspended Solids Pumped Away Example 1: (WAS Pumping Rate Calculations) Q The WAS suspended solids concentration is 5860 mglL. If 3800 lbs/day dry solids are to be wasted, (a) What must the WAS pumping rate be, in MGD?
The dye first appears at the downstream manhole in 128 seconds. The dye continues to be visible until a total elapsed time of 148 seconds. What is the ft/sec velocity of flow through the pipeline? Dye injected Manhole 2 J. I 4ooft-I First calculate the average travel time of the dye: 128 sec + 148 sec = 138 sec L Then calculate the ft/sec velocity: Velocity = 400 ft ft/sec 138 sec The Q = AV calculation estimates the theoretical velocity of flow in a channel or pipeline. Actual velocities in the pipeline can be measured by metering devices.
Cl 2 =I I ll8Olbslday Hypochlorite Then calculate the gallday sodium hypochlorite: I Chemical Dosage 41 Example 11: (Chemical Dosage) 0 A flow of 800,000 gpd uires a chlorine dose of 9 mglL. If chlorinated lime (34 o available chlorine) is to be used, how many lbslday of chlorinated lime will be required? 34) = lbs/day Conc. 34 lbslgal) = lbslday 60 lbslday = Chlorine Then calculate the lbslday chlorinated lime needed: Example 12: (Chemical Dosage) O A small reservoir holds 70 acre-feet of water.
Applied Math for Wastewater Plant Operators by Joanne K. Price